Forest Gump, feather scenes with the music or lt. dan on top of the boat thanking forrest and talking about god.
Predator, whole scene with Jesse and the minigun getting shot by the predator, then the group going nuts unloading ammo.
Basic Instinct, when the legs open up, cinema gold.
Spartacus, When Spartacus is forced to kill his friend Varro. I was pissed for days at work..
Dr. Who, When Tennet is saying his goodbyes..

The sacrifice/killing scene at the end of Apocalypse Now.
The Bible quote/English mother****er scene from Pulp Fiction.
The tipping scene in Reservoir Dogs.
Ferris Beuhler running home.
The battle for Helms Deep in LotR: Two Towers